Telegraph-sounder.



R. M. ALLEN.

TELEGRAPH SOUNDER.

APPLICATION men snnzs. 1915.

1,218,035. Patented Mar. 6,1917. I

2 SHEETS SHEET a2 2a 2.! J4

I 22 26x 9 I E I g /6 5 /7 1 1/51 o v i J0 40 &7

a. O 42 O //7 venfar: Roy M A//e/7.

mu/ v A //y ROY M. ALLEN, OF EAST OR.

are ELEGTRIC NEW JERSEY, ASSIGNOR, BY MESNE ASSIGNMENTS, r, INCORPORATED, A CORPORATION CF NEW YORK.

TELEGRAPH-SOUNDER.

Application filed September 25, 1915.

To all whom it may concern:

Be it known that 1, Roy M. ALLEN, a citi- Zen of the United States, residing at East Orange, in the county of Essex and State of New Jersey have invented certain new and useful Improvements in Telegraph-Sounders, of which the following is a full, clear, concise, and exact description.

This invention relates to electromagnetically operating devices, and is particularly useful in connection with telegraph sounders or relays.

The general object of this invention is to provide a new and improved electromagnetic structure which allows ready adjustment of the air-gap between the pole pieces of the electromagnet and the armature which cooperates with them.

For the purpose of illustration the invention is shown embodied in a telegraph sounder or relay. Figure 1 is a perspective view, with certain parts broken away, of a sounder having the invention embodied therein; Fig. 2 is a sectional plan view on the line 22 of Fig. 3; and Fig. 3 is a fragmentary sectional elevation on the line 33 of Fig. 2.

The various parts of the device are shown as mounted on a base 5 which may be of wood or other suitable material. This base carries the terminals 6 and 7 through which connection is made to the-operating electromagnets. The various parts of the sounder or relay structure are mounted on a base plate 8, which is supported slightly above the upper surface of the base 5 by spacing numbers 9, 10, 11 and 12, through which pass screws 14 as clearly shown in the drawings. Mounted on the base plate 8 is a U-shaped member 16, the sides of which carry' two screws 17 between which the sounder bar 18 is pivotally supported in the well-known manner. The free end of the sounder bar 18 is arranged in a well-known manner to vibrate in engagement with an anvil 19 carrying an adjusting screw 20 by which the extent of movement of said sounder bar can be regulated. Cooperating with the sounder bar 18 at its pivoted end is a spring 22, the tension of which can be regulated in a wellknown manner by an adjusting screw 23 which passes through the upper end of the U-shaped member 16. The magnet coils 25 and 26 are mounted on cores 27 and 28, supported in parallel and vertical positions by a Specification of Letters Patent.

Patented Mar. 6, 1917.

Serial No. 52,595.

yoke 30 in which said cores at their bottom ends are secured. The upper ends of said cores 27 and 28 are provided with pole pieces 31 and 32 having pole faces which lie in a plane inclined to the axes of the magnet coils 25 and 2(3 and of the cores 27 and (ooperating with the faces of the pole pieces 31 and 32 is an armature 33 mounted in a notch in the sounder bar 18 and secured thereto by a screw 3i, as clearly shown in Fig. 1. The yoke 30, upon which the magnet coils and their cores are supported, is secured by screws 36 to a plate 37 arranged for sliding movement beneath the base plate 8. As shown in Figs. 2 and 3, the sliding plate 37 near one end engages grooves in the spacing members 11 and 12. Near its other end said plate 37 is provided with a slot 38 with which cooperates a screw 39 eccentrically mounted in a rotatable stud 40, rotatably carried by the base plate 8. Between the head of the screw 39 and the plate 37 is a spring washer 41; and projecting from stud 1c is a pin 12 which serves as a finger piece for rotating said stud. A pin 43, mounted in and projecting downwardly from the base plate 8 into a slot 44 in the sliding plate 37, serves with the spacing members 11 and 12 to restrict the sliding plate 37 to a right line movement under the control of the regulating means just de scribed.

\Vith this structure it is evident that the air-gaps between the armature 33 and the inclined pole faces of the magnets can be siniiultaneously adjusted by rotating'the stud 10, and thereby sliding the plate 37 upon which the magnet coils and cores are mounted. This arrangement permits a delicate adjustment of the air-gaps while the device is operating.

What is claimed is:

1. In a telegraph sounder, a pair of magnet coils, parallel cores therefor having pole pieces with faces lying in a plane inclined at an angle to the axes of said coils. a yoke upon which said cores and coils are vertically mounted, a pivotally supported sounder bar, an armature carried by said sounder bar cooperating with the faces of said pole pieces, a sliding plate to which said yoke is secured, and means cooperating with said sliding plate for moving the same whereby the air-gap between said pole pieces and said armature may be regulated.

' Lemma tricaily mounted screw which cooperates with a slot in said sliding plate for moving the latter, whereby the air-gap between the pole pieces and said armature may be regulated.

In witness whereof, I hereunto subscribe my name this 24th day of September A. D, 1915.

ltQY M. ALLEN. 

